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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (C) 2008 The Guava Authors<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * Licensed under the Apache License, Version 2.0 (the "License");<a name="line.4"></a>
<span class="sourceLineNo">005</span> * you may not use this file except in compliance with the License.<a name="line.5"></a>
<span class="sourceLineNo">006</span> * You may obtain a copy of the License at<a name="line.6"></a>
<span class="sourceLineNo">007</span> *<a name="line.7"></a>
<span class="sourceLineNo">008</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * Unless required by applicable law or agreed to in writing, software<a name="line.10"></a>
<span class="sourceLineNo">011</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.11"></a>
<span class="sourceLineNo">012</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.12"></a>
<span class="sourceLineNo">013</span> * See the License for the specific language governing permissions and<a name="line.13"></a>
<span class="sourceLineNo">014</span> * limitations under the License.<a name="line.14"></a>
<span class="sourceLineNo">015</span> */<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>package com.google.common.collect;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import static com.google.common.base.Preconditions.checkNotNull;<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>import com.google.common.annotations.GwtCompatible;<a name="line.21"></a>
<span class="sourceLineNo">022</span><a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.Map;<a name="line.23"></a>
<span class="sourceLineNo">024</span><a name="line.24"></a>
<span class="sourceLineNo">025</span>/**<a name="line.25"></a>
<span class="sourceLineNo">026</span> * An immutable {@link BiMap} with reliable user-specified iteration order. Does<a name="line.26"></a>
<span class="sourceLineNo">027</span> * not permit null keys or values. An {@code ImmutableBiMap} and its inverse<a name="line.27"></a>
<span class="sourceLineNo">028</span> * have the same iteration ordering.<a name="line.28"></a>
<span class="sourceLineNo">029</span> *<a name="line.29"></a>
<span class="sourceLineNo">030</span> * &lt;p&gt;An instance of {@code ImmutableBiMap} contains its own data and will<a name="line.30"></a>
<span class="sourceLineNo">031</span> * &lt;i&gt;never&lt;/i&gt; change. {@code ImmutableBiMap} is convenient for<a name="line.31"></a>
<span class="sourceLineNo">032</span> * {@code public static final} maps ("constant maps") and also lets you easily<a name="line.32"></a>
<span class="sourceLineNo">033</span> * make a "defensive copy" of a bimap provided to your class by a caller.<a name="line.33"></a>
<span class="sourceLineNo">034</span> *<a name="line.34"></a>
<span class="sourceLineNo">035</span> * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; Although this class is not final, it cannot be subclassed as<a name="line.35"></a>
<span class="sourceLineNo">036</span> * it has no public or protected constructors. Thus, instances of this class are<a name="line.36"></a>
<span class="sourceLineNo">037</span> * guaranteed to be immutable.<a name="line.37"></a>
<span class="sourceLineNo">038</span> *<a name="line.38"></a>
<span class="sourceLineNo">039</span> * @author Jared Levy<a name="line.39"></a>
<span class="sourceLineNo">040</span> * @since 2.0 (imported from Google Collections Library)<a name="line.40"></a>
<span class="sourceLineNo">041</span> */<a name="line.41"></a>
<span class="sourceLineNo">042</span>@GwtCompatible(serializable = true, emulated = true)<a name="line.42"></a>
<span class="sourceLineNo">043</span>public abstract class ImmutableBiMap&lt;K, V&gt; extends ImmutableMap&lt;K, V&gt;<a name="line.43"></a>
<span class="sourceLineNo">044</span>    implements BiMap&lt;K, V&gt; {<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>  /**<a name="line.46"></a>
<span class="sourceLineNo">047</span>   * Returns the empty bimap.<a name="line.47"></a>
<span class="sourceLineNo">048</span>   */<a name="line.48"></a>
<span class="sourceLineNo">049</span>  // Casting to any type is safe because the set will never hold any elements.<a name="line.49"></a>
<span class="sourceLineNo">050</span>  @SuppressWarnings("unchecked")<a name="line.50"></a>
<span class="sourceLineNo">051</span>  public static &lt;K, V&gt; ImmutableBiMap&lt;K, V&gt; of() {<a name="line.51"></a>
<span class="sourceLineNo">052</span>    return (ImmutableBiMap&lt;K, V&gt;) EmptyImmutableBiMap.INSTANCE;<a name="line.52"></a>
<span class="sourceLineNo">053</span>  }<a name="line.53"></a>
<span class="sourceLineNo">054</span><a name="line.54"></a>
<span class="sourceLineNo">055</span>  /**<a name="line.55"></a>
<span class="sourceLineNo">056</span>   * Returns an immutable bimap containing a single entry.<a name="line.56"></a>
<span class="sourceLineNo">057</span>   */<a name="line.57"></a>
<span class="sourceLineNo">058</span>  public static &lt;K, V&gt; ImmutableBiMap&lt;K, V&gt; of(K k1, V v1) {<a name="line.58"></a>
<span class="sourceLineNo">059</span>    checkNotNull(k1, "null key in entry: null=%s", v1);<a name="line.59"></a>
<span class="sourceLineNo">060</span>    checkNotNull(v1, "null value in entry: %s=null", k1);<a name="line.60"></a>
<span class="sourceLineNo">061</span>    return new SingletonImmutableBiMap&lt;K, V&gt;(k1, v1);<a name="line.61"></a>
<span class="sourceLineNo">062</span>  }<a name="line.62"></a>
<span class="sourceLineNo">063</span><a name="line.63"></a>
<span class="sourceLineNo">064</span>  /**<a name="line.64"></a>
<span class="sourceLineNo">065</span>   * Returns an immutable map containing the given entries, in order.<a name="line.65"></a>
<span class="sourceLineNo">066</span>   *<a name="line.66"></a>
<span class="sourceLineNo">067</span>   * @throws IllegalArgumentException if duplicate keys or values are added<a name="line.67"></a>
<span class="sourceLineNo">068</span>   */<a name="line.68"></a>
<span class="sourceLineNo">069</span>  public static &lt;K, V&gt; ImmutableBiMap&lt;K, V&gt; of(K k1, V v1, K k2, V v2) {<a name="line.69"></a>
<span class="sourceLineNo">070</span>    return new RegularImmutableBiMap&lt;K, V&gt;(ImmutableMap.of(k1, v1, k2, v2));<a name="line.70"></a>
<span class="sourceLineNo">071</span>  }<a name="line.71"></a>
<span class="sourceLineNo">072</span><a name="line.72"></a>
<span class="sourceLineNo">073</span>  /**<a name="line.73"></a>
<span class="sourceLineNo">074</span>   * Returns an immutable map containing the given entries, in order.<a name="line.74"></a>
<span class="sourceLineNo">075</span>   *<a name="line.75"></a>
<span class="sourceLineNo">076</span>   * @throws IllegalArgumentException if duplicate keys or values are added<a name="line.76"></a>
<span class="sourceLineNo">077</span>   */<a name="line.77"></a>
<span class="sourceLineNo">078</span>  public static &lt;K, V&gt; ImmutableBiMap&lt;K, V&gt; of(<a name="line.78"></a>
<span class="sourceLineNo">079</span>      K k1, V v1, K k2, V v2, K k3, V v3) {<a name="line.79"></a>
<span class="sourceLineNo">080</span>    return new RegularImmutableBiMap&lt;K, V&gt;(ImmutableMap.of(<a name="line.80"></a>
<span class="sourceLineNo">081</span>        k1, v1, k2, v2, k3, v3));<a name="line.81"></a>
<span class="sourceLineNo">082</span>  }<a name="line.82"></a>
<span class="sourceLineNo">083</span><a name="line.83"></a>
<span class="sourceLineNo">084</span>  /**<a name="line.84"></a>
<span class="sourceLineNo">085</span>   * Returns an immutable map containing the given entries, in order.<a name="line.85"></a>
<span class="sourceLineNo">086</span>   *<a name="line.86"></a>
<span class="sourceLineNo">087</span>   * @throws IllegalArgumentException if duplicate keys or values are added<a name="line.87"></a>
<span class="sourceLineNo">088</span>   */<a name="line.88"></a>
<span class="sourceLineNo">089</span>  public static &lt;K, V&gt; ImmutableBiMap&lt;K, V&gt; of(<a name="line.89"></a>
<span class="sourceLineNo">090</span>      K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4) {<a name="line.90"></a>
<span class="sourceLineNo">091</span>    return new RegularImmutableBiMap&lt;K, V&gt;(ImmutableMap.of(<a name="line.91"></a>
<span class="sourceLineNo">092</span>        k1, v1, k2, v2, k3, v3, k4, v4));<a name="line.92"></a>
<span class="sourceLineNo">093</span>  }<a name="line.93"></a>
<span class="sourceLineNo">094</span><a name="line.94"></a>
<span class="sourceLineNo">095</span>  /**<a name="line.95"></a>
<span class="sourceLineNo">096</span>   * Returns an immutable map containing the given entries, in order.<a name="line.96"></a>
<span class="sourceLineNo">097</span>   *<a name="line.97"></a>
<span class="sourceLineNo">098</span>   * @throws IllegalArgumentException if duplicate keys or values are added<a name="line.98"></a>
<span class="sourceLineNo">099</span>   */<a name="line.99"></a>
<span class="sourceLineNo">100</span>  public static &lt;K, V&gt; ImmutableBiMap&lt;K, V&gt; of(<a name="line.100"></a>
<span class="sourceLineNo">101</span>      K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5) {<a name="line.101"></a>
<span class="sourceLineNo">102</span>    return new RegularImmutableBiMap&lt;K, V&gt;(ImmutableMap.of(<a name="line.102"></a>
<span class="sourceLineNo">103</span>        k1, v1, k2, v2, k3, v3, k4, v4, k5, v5));<a name="line.103"></a>
<span class="sourceLineNo">104</span>  }<a name="line.104"></a>
<span class="sourceLineNo">105</span><a name="line.105"></a>
<span class="sourceLineNo">106</span>  // looking for of() with &gt; 5 entries? Use the builder instead.<a name="line.106"></a>
<span class="sourceLineNo">107</span><a name="line.107"></a>
<span class="sourceLineNo">108</span>  /**<a name="line.108"></a>
<span class="sourceLineNo">109</span>   * Returns a new builder. The generated builder is equivalent to the builder<a name="line.109"></a>
<span class="sourceLineNo">110</span>   * created by the {@link Builder} constructor.<a name="line.110"></a>
<span class="sourceLineNo">111</span>   */<a name="line.111"></a>
<span class="sourceLineNo">112</span>  public static &lt;K, V&gt; Builder&lt;K, V&gt; builder() {<a name="line.112"></a>
<span class="sourceLineNo">113</span>    return new Builder&lt;K, V&gt;();<a name="line.113"></a>
<span class="sourceLineNo">114</span>  }<a name="line.114"></a>
<span class="sourceLineNo">115</span><a name="line.115"></a>
<span class="sourceLineNo">116</span>  /**<a name="line.116"></a>
<span class="sourceLineNo">117</span>   * A builder for creating immutable bimap instances, especially {@code public<a name="line.117"></a>
<span class="sourceLineNo">118</span>   * static final} bimaps ("constant bimaps"). Example: &lt;pre&gt;   {@code<a name="line.118"></a>
<span class="sourceLineNo">119</span>   *<a name="line.119"></a>
<span class="sourceLineNo">120</span>   *   static final ImmutableBiMap&lt;String, Integer&gt; WORD_TO_INT =<a name="line.120"></a>
<span class="sourceLineNo">121</span>   *       new ImmutableBiMap.Builder&lt;String, Integer&gt;()<a name="line.121"></a>
<span class="sourceLineNo">122</span>   *           .put("one", 1)<a name="line.122"></a>
<span class="sourceLineNo">123</span>   *           .put("two", 2)<a name="line.123"></a>
<span class="sourceLineNo">124</span>   *           .put("three", 3)<a name="line.124"></a>
<span class="sourceLineNo">125</span>   *           .build();}&lt;/pre&gt;<a name="line.125"></a>
<span class="sourceLineNo">126</span>   *<a name="line.126"></a>
<span class="sourceLineNo">127</span>   * For &lt;i&gt;small&lt;/i&gt; immutable bimaps, the {@code ImmutableBiMap.of()} methods<a name="line.127"></a>
<span class="sourceLineNo">128</span>   * are even more convenient.<a name="line.128"></a>
<span class="sourceLineNo">129</span>   *<a name="line.129"></a>
<span class="sourceLineNo">130</span>   * &lt;p&gt;Builder instances can be reused - it is safe to call {@link #build}<a name="line.130"></a>
<span class="sourceLineNo">131</span>   * multiple times to build multiple bimaps in series. Each bimap is a superset<a name="line.131"></a>
<span class="sourceLineNo">132</span>   * of the bimaps created before it.<a name="line.132"></a>
<span class="sourceLineNo">133</span>   *<a name="line.133"></a>
<span class="sourceLineNo">134</span>   * @since 2.0 (imported from Google Collections Library)<a name="line.134"></a>
<span class="sourceLineNo">135</span>   */<a name="line.135"></a>
<span class="sourceLineNo">136</span>  public static final class Builder&lt;K, V&gt; extends ImmutableMap.Builder&lt;K, V&gt; {<a name="line.136"></a>
<span class="sourceLineNo">137</span><a name="line.137"></a>
<span class="sourceLineNo">138</span>    /**<a name="line.138"></a>
<span class="sourceLineNo">139</span>     * Creates a new builder. The returned builder is equivalent to the builder<a name="line.139"></a>
<span class="sourceLineNo">140</span>     * generated by {@link ImmutableBiMap#builder}.<a name="line.140"></a>
<span class="sourceLineNo">141</span>     */<a name="line.141"></a>
<span class="sourceLineNo">142</span>    public Builder() {}<a name="line.142"></a>
<span class="sourceLineNo">143</span><a name="line.143"></a>
<span class="sourceLineNo">144</span>    /**<a name="line.144"></a>
<span class="sourceLineNo">145</span>     * Associates {@code key} with {@code value} in the built bimap. Duplicate<a name="line.145"></a>
<span class="sourceLineNo">146</span>     * keys or values are not allowed, and will cause {@link #build} to fail.<a name="line.146"></a>
<span class="sourceLineNo">147</span>     */<a name="line.147"></a>
<span class="sourceLineNo">148</span>    @Override public Builder&lt;K, V&gt; put(K key, V value) {<a name="line.148"></a>
<span class="sourceLineNo">149</span>      super.put(key, value);<a name="line.149"></a>
<span class="sourceLineNo">150</span>      return this;<a name="line.150"></a>
<span class="sourceLineNo">151</span>    }<a name="line.151"></a>
<span class="sourceLineNo">152</span><a name="line.152"></a>
<span class="sourceLineNo">153</span>    /**<a name="line.153"></a>
<span class="sourceLineNo">154</span>     * Associates all of the given map's keys and values in the built bimap.<a name="line.154"></a>
<span class="sourceLineNo">155</span>     * Duplicate keys or values are not allowed, and will cause {@link #build}<a name="line.155"></a>
<span class="sourceLineNo">156</span>     * to fail.<a name="line.156"></a>
<span class="sourceLineNo">157</span>     *<a name="line.157"></a>
<span class="sourceLineNo">158</span>     * @throws NullPointerException if any key or value in {@code map} is null<a name="line.158"></a>
<span class="sourceLineNo">159</span>     */<a name="line.159"></a>
<span class="sourceLineNo">160</span>    @Override public Builder&lt;K, V&gt; putAll(Map&lt;? extends K, ? extends V&gt; map) {<a name="line.160"></a>
<span class="sourceLineNo">161</span>      super.putAll(map);<a name="line.161"></a>
<span class="sourceLineNo">162</span>      return this;<a name="line.162"></a>
<span class="sourceLineNo">163</span>    }<a name="line.163"></a>
<span class="sourceLineNo">164</span><a name="line.164"></a>
<span class="sourceLineNo">165</span>    /**<a name="line.165"></a>
<span class="sourceLineNo">166</span>     * Returns a newly-created immutable bimap.<a name="line.166"></a>
<span class="sourceLineNo">167</span>     *<a name="line.167"></a>
<span class="sourceLineNo">168</span>     * @throws IllegalArgumentException if duplicate keys or values were added<a name="line.168"></a>
<span class="sourceLineNo">169</span>     */<a name="line.169"></a>
<span class="sourceLineNo">170</span>    @Override public ImmutableBiMap&lt;K, V&gt; build() {<a name="line.170"></a>
<span class="sourceLineNo">171</span>      ImmutableMap&lt;K, V&gt; map = super.build();<a name="line.171"></a>
<span class="sourceLineNo">172</span>      if (map instanceof ImmutableBiMap) {<a name="line.172"></a>
<span class="sourceLineNo">173</span>        return (ImmutableBiMap&lt;K, V&gt;) map;<a name="line.173"></a>
<span class="sourceLineNo">174</span>      } else {<a name="line.174"></a>
<span class="sourceLineNo">175</span>        return new RegularImmutableBiMap&lt;K, V&gt;(map);<a name="line.175"></a>
<span class="sourceLineNo">176</span>      }<a name="line.176"></a>
<span class="sourceLineNo">177</span>    }<a name="line.177"></a>
<span class="sourceLineNo">178</span>  }<a name="line.178"></a>
<span class="sourceLineNo">179</span><a name="line.179"></a>
<span class="sourceLineNo">180</span>  /**<a name="line.180"></a>
<span class="sourceLineNo">181</span>   * Returns an immutable bimap containing the same entries as {@code map}. If<a name="line.181"></a>
<span class="sourceLineNo">182</span>   * {@code map} somehow contains entries with duplicate keys (for example, if<a name="line.182"></a>
<span class="sourceLineNo">183</span>   * it is a {@code SortedMap} whose comparator is not &lt;i&gt;consistent with<a name="line.183"></a>
<span class="sourceLineNo">184</span>   * equals&lt;/i&gt;), the results of this method are undefined.<a name="line.184"></a>
<span class="sourceLineNo">185</span>   *<a name="line.185"></a>
<span class="sourceLineNo">186</span>   * &lt;p&gt;Despite the method name, this method attempts to avoid actually copying<a name="line.186"></a>
<span class="sourceLineNo">187</span>   * the data when it is safe to do so. The exact circumstances under which a<a name="line.187"></a>
<span class="sourceLineNo">188</span>   * copy will or will not be performed are undocumented and subject to change.<a name="line.188"></a>
<span class="sourceLineNo">189</span>   *<a name="line.189"></a>
<span class="sourceLineNo">190</span>   * @throws IllegalArgumentException if two keys have the same value<a name="line.190"></a>
<span class="sourceLineNo">191</span>   * @throws NullPointerException if any key or value in {@code map} is null<a name="line.191"></a>
<span class="sourceLineNo">192</span>   */<a name="line.192"></a>
<span class="sourceLineNo">193</span>  public static &lt;K, V&gt; ImmutableBiMap&lt;K, V&gt; copyOf(<a name="line.193"></a>
<span class="sourceLineNo">194</span>      Map&lt;? extends K, ? extends V&gt; map) {<a name="line.194"></a>
<span class="sourceLineNo">195</span>    if (map instanceof ImmutableBiMap) {<a name="line.195"></a>
<span class="sourceLineNo">196</span>      @SuppressWarnings("unchecked") // safe since map is not writable<a name="line.196"></a>
<span class="sourceLineNo">197</span>      ImmutableBiMap&lt;K, V&gt; bimap = (ImmutableBiMap&lt;K, V&gt;) map;<a name="line.197"></a>
<span class="sourceLineNo">198</span>      // TODO(user): if we need to make a copy of a BiMap because the<a name="line.198"></a>
<span class="sourceLineNo">199</span>      // forward map is a view, don't make a copy of the non-view delegate map<a name="line.199"></a>
<span class="sourceLineNo">200</span>      if (!bimap.isPartialView()) {<a name="line.200"></a>
<span class="sourceLineNo">201</span>        return bimap;<a name="line.201"></a>
<span class="sourceLineNo">202</span>      }<a name="line.202"></a>
<span class="sourceLineNo">203</span>    }<a name="line.203"></a>
<span class="sourceLineNo">204</span><a name="line.204"></a>
<span class="sourceLineNo">205</span>    ImmutableMap&lt;K, V&gt; immutableMap = ImmutableMap.copyOf(map);<a name="line.205"></a>
<span class="sourceLineNo">206</span>    if (immutableMap instanceof ImmutableBiMap) {<a name="line.206"></a>
<span class="sourceLineNo">207</span>      return (ImmutableBiMap&lt;K, V&gt;) immutableMap;<a name="line.207"></a>
<span class="sourceLineNo">208</span>    } else {<a name="line.208"></a>
<span class="sourceLineNo">209</span>      return new RegularImmutableBiMap&lt;K, V&gt;(immutableMap);<a name="line.209"></a>
<span class="sourceLineNo">210</span>    }<a name="line.210"></a>
<span class="sourceLineNo">211</span>  }<a name="line.211"></a>
<span class="sourceLineNo">212</span><a name="line.212"></a>
<span class="sourceLineNo">213</span>  ImmutableBiMap() {}<a name="line.213"></a>
<span class="sourceLineNo">214</span><a name="line.214"></a>
<span class="sourceLineNo">215</span>  /**<a name="line.215"></a>
<span class="sourceLineNo">216</span>   * {@inheritDoc}<a name="line.216"></a>
<span class="sourceLineNo">217</span>   *<a name="line.217"></a>
<span class="sourceLineNo">218</span>   * &lt;p&gt;The inverse of an {@code ImmutableBiMap} is another<a name="line.218"></a>
<span class="sourceLineNo">219</span>   * {@code ImmutableBiMap}.<a name="line.219"></a>
<span class="sourceLineNo">220</span>   */<a name="line.220"></a>
<span class="sourceLineNo">221</span>  @Override<a name="line.221"></a>
<span class="sourceLineNo">222</span>  public abstract ImmutableBiMap&lt;V, K&gt; inverse();<a name="line.222"></a>
<span class="sourceLineNo">223</span><a name="line.223"></a>
<span class="sourceLineNo">224</span>  /**<a name="line.224"></a>
<span class="sourceLineNo">225</span>   * Returns an immutable set of the values in this map. The values are in the<a name="line.225"></a>
<span class="sourceLineNo">226</span>   * same order as the parameters used to build this map.<a name="line.226"></a>
<span class="sourceLineNo">227</span>   */<a name="line.227"></a>
<span class="sourceLineNo">228</span>  @Override public ImmutableSet&lt;V&gt; values() {<a name="line.228"></a>
<span class="sourceLineNo">229</span>    return inverse().keySet();<a name="line.229"></a>
<span class="sourceLineNo">230</span>  }<a name="line.230"></a>
<span class="sourceLineNo">231</span><a name="line.231"></a>
<span class="sourceLineNo">232</span>  /**<a name="line.232"></a>
<span class="sourceLineNo">233</span>   * Guaranteed to throw an exception and leave the bimap unmodified.<a name="line.233"></a>
<span class="sourceLineNo">234</span>   *<a name="line.234"></a>
<span class="sourceLineNo">235</span>   * @throws UnsupportedOperationException always<a name="line.235"></a>
<span class="sourceLineNo">236</span>   * @deprecated Unsupported operation.<a name="line.236"></a>
<span class="sourceLineNo">237</span>   */<a name="line.237"></a>
<span class="sourceLineNo">238</span>  @Deprecated<a name="line.238"></a>
<span class="sourceLineNo">239</span>  @Override<a name="line.239"></a>
<span class="sourceLineNo">240</span>  public V forcePut(K key, V value) {<a name="line.240"></a>
<span class="sourceLineNo">241</span>    throw new UnsupportedOperationException();<a name="line.241"></a>
<span class="sourceLineNo">242</span>  }<a name="line.242"></a>
<span class="sourceLineNo">243</span><a name="line.243"></a>
<span class="sourceLineNo">244</span>  /**<a name="line.244"></a>
<span class="sourceLineNo">245</span>   * Serialized type for all ImmutableBiMap instances. It captures the logical<a name="line.245"></a>
<span class="sourceLineNo">246</span>   * contents and they are reconstructed using public factory methods. This<a name="line.246"></a>
<span class="sourceLineNo">247</span>   * ensures that the implementation types remain as implementation details.<a name="line.247"></a>
<span class="sourceLineNo">248</span>   *<a name="line.248"></a>
<span class="sourceLineNo">249</span>   * Since the bimap is immutable, ImmutableBiMap doesn't require special logic<a name="line.249"></a>
<span class="sourceLineNo">250</span>   * for keeping the bimap and its inverse in sync during serialization, the way<a name="line.250"></a>
<span class="sourceLineNo">251</span>   * AbstractBiMap does.<a name="line.251"></a>
<span class="sourceLineNo">252</span>   */<a name="line.252"></a>
<span class="sourceLineNo">253</span>  private static class SerializedForm extends ImmutableMap.SerializedForm {<a name="line.253"></a>
<span class="sourceLineNo">254</span>    SerializedForm(ImmutableBiMap&lt;?, ?&gt; bimap) {<a name="line.254"></a>
<span class="sourceLineNo">255</span>      super(bimap);<a name="line.255"></a>
<span class="sourceLineNo">256</span>    }<a name="line.256"></a>
<span class="sourceLineNo">257</span>    @Override Object readResolve() {<a name="line.257"></a>
<span class="sourceLineNo">258</span>      Builder&lt;Object, Object&gt; builder = new Builder&lt;Object, Object&gt;();<a name="line.258"></a>
<span class="sourceLineNo">259</span>      return createMap(builder);<a name="line.259"></a>
<span class="sourceLineNo">260</span>    }<a name="line.260"></a>
<span class="sourceLineNo">261</span>    private static final long serialVersionUID = 0;<a name="line.261"></a>
<span class="sourceLineNo">262</span>  }<a name="line.262"></a>
<span class="sourceLineNo">263</span><a name="line.263"></a>
<span class="sourceLineNo">264</span>  @Override Object writeReplace() {<a name="line.264"></a>
<span class="sourceLineNo">265</span>    return new SerializedForm(this);<a name="line.265"></a>
<span class="sourceLineNo">266</span>  }<a name="line.266"></a>
<span class="sourceLineNo">267</span>}<a name="line.267"></a>




























































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